This patch came from in-house.  A patch to make -I imply -S was submitted

upstream, but rejected, so this is the next simplest way to work around

issues with when the site module is imported.

--- Python-3.5.0rc2/Lib/test/test_site.py.~1~	2015-08-25 10:19:13.000000000 -0700

+++ Python-3.5.0rc2/Lib/test/test_site.py	2015-09-02 12:38:45.356337855 -0700

@@ -438,7 +438,7 @@

     def test_startup_imports(self):

         # This tests checks which modules are loaded by Python when it

         # initially starts upon startup.

-        popen = subprocess.Popen([sys.executable, '-I', '-v', '-c',

+        popen = subprocess.Popen([sys.executable, '-I', '-S', '-v', '-c',

                                   'import sys; print(set(sys.modules))'],

                                  stdout=subprocess.PIPE,

                                  stderr=subprocess.PIPE)

@@ -447,8 +447,6 @@

         stderr = stderr.decode('utf-8')

         modules = eval(stdout)

-        self.assertIn('site', modules)

-

         # http://bugs.python.org/issue19205

         re_mods = {'re', '_sre', 'sre_compile', 'sre_constants', 'sre_parse'}

         # _osx_support uses the re module in many placs